/*****************************

frontier CSS

*****************************/

.frontier .inner {
  max-width: 1000px;
}

.archive_list {
  display: flex;
  justify-content: flex-start;
  align-items: flex-start;
  flex-wrap: wrap;
  padding-top: 45px;
  border-top: 1px solid #323232;
}
.archive_list li {
  width: calc((100% - 150px) / 4);
  margin-right: 50px;
  margin-bottom: 50px;
}
.archive_list li:nth-of-type(4n) {
  margin-right: 0;
}

.archive_list .frontier_item {
  display: block;
  position: relative;
}
.archive_list .frontier_item::before {
  content: "";
}

.archive_list .cover_img {
  border: 1px solid #d1d1d1;
  margin-bottom: 10px;
}

@media all and (min-width: 901px) {
  .archive_list .frontier_item:hover {
    background-color: #e7e7e7;
  }
  .archive_list .frontier_item:hover img {
    opacity: 1;
  }
}

.archive_list .day {
  font-size: 1.3rem;
  line-height: 1;
  margin-bottom: 10px;
}
.archive_list .ttl {
  font-size: 2rem;
  font-weight: 600;
  color: #002c76;
  line-height: 1;
}
.archive_list .data_memory {
  font-size: 1.3rem;
  font-weight: 400;
  color: #323232;
}
.archive_list .ttl i {
  /* color: #000; */
}

@media all and (max-width: 900px) {
  .archive_list li {
    width: calc((100% - 90px) / 4);
    margin-right: 30px;
    margin-bottom: 50px;
  }
}
@media all and (max-width: 600px) {
  .archive_list {
    border-top: none;
    padding-top: 0;
  }
  .archive_list li {
    /* width: calc((100% - 30px) / 2); */
    width: 80%;
    margin: 0 auto 40px;
    /* margin-right: 30px; */
    margin-bottom: 80px;
  }
  .archive_list li:nth-of-type(4n) {
    /* margin-right: 30px; */
  }
  .archive_list li:nth-of-type(2n) {
    margin-right: auto;
  }
  .archive_list li:last-of-type {
    margin-bottom: 0;
  }
  .archive_list .day {
    text-align: center;
  }
  .archive_list .ttl {
    font-size: 2rem;
    text-align: center;
  }
}
/* archive pagination
-------------------------------------- */
.pagination {
  padding-top: 20px;
}
.pagination_inner {
  /* width: calc(100% - 300px); */
  width: 100%;
  margin: 0 auto;
  text-align: center;
}